Bolt-clamp for vise-jaws



C. ALGRIM.

BOLT CLAMP FOR VISE JAWS.

APPLICATION FILED APR.27, 1921.

Patented Nov. 1, 1921. 52 .1.

UNITED STATES PATENT OFFICE.

BOLT-CLAIM? FOR VISE-JAWS.

Application filed April 27, 1921.

To all whom it may concern:

Be it known that 1, CHARLES ALGRIM, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Bolt-Clamps for Vise-Jaws, of which the following is a specification.

The invention relates to improvements in bolt clamps for vise jaws.

One of the objects of the invention is to provide improved means forholding a headed bolt.

Another object is to provide improved means for holding bolts of anypractical length so that a given length of the threaded end, or the endto be threaded, will project beyond the "holding means accessible forthreading or for removing a nut therefrom.

Another object is to provide an improved means for holding a bolt whichwill locate the bolt in a true horizontal position and which will clampthe shank of the bolt without materially engaging the head.

Another object is to provide a pair of clamping jaws for holdingcarriage bolts, machine bolts, la screws, and the like, headed rivets,pint le pins, screws and other similar objects, and which clampingmembers may be inserted between the jaws of an ordinary screw operatedvise for occasional use or the jaws of the vise may be made to containthe advantageous features of the clamping members to directly engage andhold the bolts.

Other, further and more specific objects of the invention will readilyoccur to persons versed in the art, from a consideration of thefollowing description when taken in conjunction with the accompanyingdrawings forming a part hereof, wherein Figure 1 is a plan view of apair of my improved clamping members, as they appear when in a vise,holding therebetween an unthreaded carriage bolt.

Fig. 2 is a similar view of the same showing the clamping membersengaging a machine bolt.

Fig. 3 is a longitudinal section taken substantially on line 33 of Fig.1.

Fig. 4 is a transverse section taken substantially on line 4-4 of Fig.1.

Fig. 5 is a similar view taken substantially on line 5-5 of Fig. 2.

In all the views the same reference characters are used to indicatesimilar parts.

Specification of Letters Patent.

Patented Nov. 1, 1921.

Serial No. 464,827.

The bolt clamping device consists of two duplicate clamping members 10and 11. Each clamping member has in its confrontmg face a series ofnotches 12 to receive heads of bolts, or to permit the heads of bolts tolie therein so that the clamping members may engage the bolt shanks toclamp and hold the bolt.

Each notch has a right angular portion 15 to accommodate square headedmachine bolts 13, the head 14 of which lies within the opening betweenthese portions of the notches as more clearly shown in Fig. 2. Thesenotches also engage the head in such fashion that the bolt is firmlyheld to resist any effort to move the bolt axially, as when pressure isapplied to the bolt, as in the act of threading the projecting end. Thenotch is laterally protracted into a more deeply extended triangularportion 16 to permit the button head 17 of a carriage bolt 18 to enterand to prevent axial movement of the bolt when its shank is clampedbetween the clamping members.

Between the notches 12 shank clamping surfaces 19 are located. Dowelpins 20 of which there may be any desired number are secured in oneclamping member, as at 21, and pass freely into the other member, as at22. These pins serve to maintain the notches 12 of the clamping membersin register and serve as horizontal supports for the shank of the bolts.

Rings 23 may be placed on the dowel pins 20 to prevent the clamps frombeing entirely closed at any one time. The rings are of less width thanthe diameter of the smallest bolt to be held between the members.

The series of like notches are made in the clamping members toaccommodate bolts of varying lengths.

Shoulders 24 may be made at the upper outer edge of each clamping memberto serve as supports on the jaws of the vise so that when the clampingjaws are disengaged from the bolt, to remove the bolt, the clampingmembers will not fall from between the jaws of the vise.

Fig. 5 shows the clamping members resting on the jaws 25 of a vise, aswhen in use.

Having described my invention what I claim as new and desire to secureby Letters Patent, is

1. In a bolt clamping and holding device, two like bolt clamping membershaving in their confronting edges a series of registering notches, eachnotch providing a part to receive the head of an angular-head bolt andanother part to receive the head of a round button-head bolt to preventaxial movement of a bolt; dowel pins near the bottom edges of theclamping members to hold the notches in register and to serve as boltrests, to hold a boltin horizontal position'and means between adjacentnotches to engage the shank of a bolt and clamp it therebetween.

2. In a bolt clamping and holding device, tWo like bolt clamping membershaving in their confronting edges a series of spaced apart registeringnotches to receive the head of a bolt and to prevent axial movementthereof; a longitudinal series of spaced apart dowel pins near thebottoms of the members extending from one member into the other to holdthe notches in register and to serve as rests to support the bolts inhorizontal position and a shoulder extending longitudinally of eachclamping member near its top edge to rest upon the jaws of a visetosupport the device on the vise.

In testimony whereof I hereunto subscribed my name.

CHARLES ALGRIM.

